Lathe



(No Model.) 3 Sheets-Sheet 1.

J. J. BREWIS.

LATHE.

No 356,678. Patented Jan. 25, 1887'.

WITNESSES .4 ttornez (No Model.) 3 Shams-Sheet a.

J J. BREWIS.

LATHE.

No. 356,678. Patented Jan. 25, 1887.

UNITED STATES PATEN'r 'rrrcu.

JOHN J. BREWIS, OF MINNEAPOLIS, MINNESOTA.

LATHE.

SPECIFICATION forming part of Letters Patent No. 355,678, dated January 25, 1887.

Application filed Juno 1, 1886. Serial No. 203,764. (No model.)

To all whom, it may concern.-

Be it known that 1, JOHN J, BREWIs,a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Miunesota, have invented certain new and useful Improvements in Metal-Turning Lat-hes, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to improvements in devices for securing head and tail stocks and cutter-carrying frames to the bed plates or frames of lathes, and is specially applicable to lathes for turning car-wheels and other bodies, such as is described and claimed in my patent of February 24, 1885, No. 312,961.

The object of my invention is to provide a simple and effective means for securing head and tail stocks, and also cutter-carrying plates or frames, to the bed or frame of the lathe in such a manner that by the manipulation of the bolt or bolts on one side of the lathe the stock or frame can be loosened, moved to the desired point, and rigidly secured to the bed of the machine.

Referring to the drawings, Figure l is an end view of a tail-stock in posit-ion for use, with sectional view of the bed or frame of the machine. Fig. 2 is anend view of a modification. Fig. 3 is an end view of the devices shown in Fig. l, with the gear-wheels and faceplate shown in outline. a is a perspective view showing a slide-rest or cutter-carrier. Pi gs. 5 a11d 6 are sectional end views ofthe device shown in Fig. at.

A indicates the tail-stock, provided with the outwardlyinclined surface a, and the dovetailed or inwardly-inclined surface 12, adapted to fit in correspondiugly-inclined surfaces 0 d, formed on the bed or frame 13 of the machine.

The bed or frame 13 is provided with a slot or cavity, 6, which terminates in an enlarged port-ion, f, adapted to receive the head of the bolt 0, which passes up through an elongated opening, (1/, in the tail-stock, on the upper end of which is secured the nut g, which impinges on the shoulder 12, formed on the tail-stock, so that by unscrewing the nut g the tail-stock can he slid back and forth on the bed B until brought to the desired position, when the nut 91 is screwed down. This forces the inclined portion a down on the inclined portion 0 of the bed, and draws the inclined or dovetailed portion 1) against the inclined surface d of the bed, thus securely locking the tail-stock in position. The same principle is shown in the modification illustrated in Fig. 2, and in which the inclines in both the stock and bcdplate are placed in a reverse direction from that shown in Fig. 1.

In Figs. 4, 5, and 6 I have shown a slide-rest for planers, shapers, cutters, and lathe-tools generally, the principle of my invention being equally applicable to tools or devices of this kind.

A indicates the tool-holder mounted on the sliding block 13', and in which the cutter or other tool 0 is secured by the screw-bolt D. The block B is adapted to slide on the inclined surfaces of the bed, as in the case of the tailstock just described, and is provided with a screw threaded lug, E, on the under side, adapted to receive the feed-screw G, and by which means the block B is moved back and forth on the bed-plate H.

The bed-plate H is provided with a T-shaped groove, 1, adapted to receive the T-headed bolts K, which pass up through the block B, the upper ends of said bolts being screwthreaded and adapted to receive the screwnuts L, and by which means the block B is readily secured at any desired point on the bed-plate H.

It is obvious that other devices for holding tools, emery-wheels, &c., may be secured to the sliding block 13 at much less expense than now practiced, as I am enabled to dispense with gibs, keys, Czc.

It will be apparent to those skilled int-his art that by having the fastening device on one side only of the machine the operator can readily set the tail-stock or tool-carrying slide at any desired point without having to go around to the other side of the lathe to manipulate the nuts and bolts, as is the case in machines of this class as now constructed.

Having'described my invention, I claim- 1. The combination of a tail-stock or toolcarrying frame for lathes,havin g the outwardly and inwardly inclined surfaces, a base or frame provided with corresponding faces and with the groove or recess, and the screw bolt and 2 sees-7s nut to engage the groove or recess, and. the

3. A tail-stock or tool-holder for lathes, havtail-stock or tool-carrier, substantially as set ing theshoulder h, andtheinclined surfacesab,

forth.

adapted to engagethe inclined surfaces 041 of 2. The combination of the base or frame pro the base or frame, in combination with the bolt I 5 5 vided with the T-shaped groove or recess, and I O and nut g, as setforth.

the outwardly and inwardly inclined faces, the tail-stock or tool-carrier provided with corresponding faces, and the bolt having its head engage with the groove or recess, and the nut to for clamping said parts together, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN J. BREWIS.

Witnesses:

J OSEF F. KOHMT, CHARLES CHURAN. 

